
/*
 * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 *版权所有2002-2021原作者。
 *
 *根据Apache许可证2.0版（“许可证”）许可；
 *除非符合许可证的规定，否则您不得使用此文件。
 *您可以在以下网址获取许可证副本
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 *除非适用法律要求或书面同意，否则软件
 *根据许可证分发是在“按原样”的基础上分发的，
 *无任何明示或暗示的保证或条件。
 *有关管理权限的特定语言，请参阅许可证
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 */

package org.springframework.context.event;

import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.core.ResolvableType;

/**
 * Extended variant of the standard {@link ApplicationListener} interface,
 * exposing further metadata such as the supported event and source type.
 *
 * <p>As of Spring Framework 4.2, this interface supersedes the Class-based
 * {@link SmartApplicationListener} with full handling of generic event types.
 * As of 5.3.5, it formally extends {@link SmartApplicationListener}, adapting
 * {@link #supportsEventType(Class)} to {@link #supportsEventType(ResolvableType)}
 * with a default method.
 *
 * @author Stephane Nicoll
 * @author Juergen Hoeller
 * @since 4.2
 * @see SmartApplicationListener
 * @see GenericApplicationListenerAdapter
 */
/**
 *标准{@link ApplicationListener}接口的扩展变体，
 *公开进一步的元数据，例如所支持的事件和源类型。
 *
 *<p>从Spring Framework 4.2开始，此接口取代了基于类的
 *｛@link SmartApplicationListener｝，可完全处理通用事件类型。
 *从5.3.5开始，它正式扩展了{@link SmartApplicationListener}
 *｛@link#supportsEventType（类）｝到｛@link#supportsEvent Type（可解析类型）｝
 *使用默认方法。
 *
 *@作者Stephane Nicoll
 *@作者Juergen Hoeller
 *@自4.2起
 *@请参阅SmartApplicationListener
 *@参见GenericApplicationListenerAdapter
 */
public interface GenericApplicationListener extends SmartApplicationListener {

	/**
	 * Overrides {@link SmartApplicationListener#supportsEventType(Class)} with
	 * delegation to {@link #supportsEventType(ResolvableType)}.
	 */
	/**
	 *用覆盖｛@link SmartApplicationListener#supportsEventType（Class）｝
	 *委托给｛@link#supportsEventType（可解析类型）｝。
	 */
	@Override
	default boolean supportsEventType(Class<? extends ApplicationEvent> eventType) {
		return supportsEventType(ResolvableType.forClass(eventType));
	}

	/**
	 * Determine whether this listener actually supports the given event type.
	 * @param eventType the event type (never {@code null})
	 */
	/**
	 *确定此侦听器是否实际支持给定的事件类型。
	 *@param eventType事件类型（从不｛@code null｝）
	 */
	boolean supportsEventType(ResolvableType eventType);

}
